Question

Q )
find the sum to infinity of the following arithmetico-geometric sequence :-

1, 2/4, 3/16, 4/64


note - kindly solve the question using this formula —
a/1-r + dr/(1-r)² ​

Answer 1

Answer:

hope this image helps you

Answer 2

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HERE IS UR ANSWER

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$\frac{1}{1 - \frac{2}{4} } + 1 \times \frac{2}{4} \\ \frac{1}{ \frac{1}{2} } + \frac{1}{2} \\ 2 + \frac{1}{2} \\ = \frac{5}{2}$